diff --git a/integration_tests/configs/ibc.jsonnet b/integration_tests/configs/ibc.jsonnet
index 42ddb56ccd..579777a4b3 100644
--- a/integration_tests/configs/ibc.jsonnet
+++ b/integration_tests/configs/ibc.jsonnet
@@ -22,7 +22,7 @@ config {
         name: 'user' + i,
         coins: '30000000000000000000000basetcro',
       }
-      for i in std.range(1, 20)
+      for i in std.range(1, 50)
     ],
     'app-config'+: {
       'index-events': super['index-events'] + ['message.action'],
@@ -97,7 +97,7 @@ config {
         name: 'user' + i,
         coins: '10000000000000cro',
       }
-      for i in std.range(1, 20)
+      for i in std.range(1, 50)
     ],
     genesis: {
       app_state: {
@@ -165,7 +165,7 @@ config {
     chains: [
       {
         id: 'cronos_777-1',
-        max_gas: 1000000,
+        max_gas: 2000000,
         gas_multiplier: 1.1,
         address_type: {
           derivation: 'ethermint',
@@ -174,7 +174,7 @@ config {
           },
         },
         gas_price: {
-          price: 10000000000000000,
+          price: 10000000,
           denom: 'basetcro',
         },
         event_source: {
diff --git a/integration_tests/configs/ibc_rly_evm.jsonnet b/integration_tests/configs/ibc_rly_evm.jsonnet
index ac77fde468..6c835a91cc 100644
--- a/integration_tests/configs/ibc_rly_evm.jsonnet
+++ b/integration_tests/configs/ibc_rly_evm.jsonnet
@@ -3,7 +3,7 @@ local ibc = import 'ibc_rly.jsonnet';
 ibc {
   relayer+: {
     chains: [super.chains[0] {
-      precompiled_contract_address: '0x0000000000000000000000000000000000000065',
+      precompiled_contract_address: '0x6F1805D56bF05b7be10857F376A5b1c160C8f72C',
       json_rpc_address: 'http://127.0.0.1:26701',
     }] + super.chains[1:],
   },
diff --git a/integration_tests/contracts/contracts/TestRelayer.sol b/integration_tests/contracts/contracts/TestRelayer.sol
new file mode 100644
index 0000000000..663b02e65f
--- /dev/null
+++ b/integration_tests/contracts/contracts/TestRelayer.sol
@@ -0,0 +1,13 @@
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.4;
+
+contract TestRelayer {
+    address constant relayer = 0x0000000000000000000000000000000000000065;
+
+    function batchCall(bytes[] memory payloads) public {
+        for (uint256 i = 0; i < payloads.length; i++) {
+            (bool success,) = relayer.call(payloads[i]);
+            require(success);
+        }
+    }
+}
diff --git a/integration_tests/ibc_utils.py b/integration_tests/ibc_utils.py
index dc4dba0a21..555784a34c 100644
--- a/integration_tests/ibc_utils.py
+++ b/integration_tests/ibc_utils.py
@@ -14,6 +14,7 @@
     ADDRS,
     CONTRACTS,
     deploy_contract,
+    derive_new_account,
     eth_to_bech32,
     parse_events,
     parse_events_rpc,
@@ -25,6 +26,7 @@
 )
 
 RATIO = 10**10
+RELAYER_CALLER = "0x6F1805D56bF05b7be10857F376A5b1c160C8f72C"
 
 
 class Status(IntEnum):
@@ -171,6 +173,17 @@ def prepare_network(
 
         version = {"fee_version": "ics29-1", "app_version": "ics20-1"}
         path = cronos.base_dir.parent / "relayer"
+        w3 = cronos.w3
+        acc = derive_new_account(2)
+        sender = acc.address
+        # fund new sender to deploy contract with same address
+        if w3.eth.get_balance(sender, "latest") == 0:
+            fund = 3000000000000000000
+            tx = {"to": sender, "value": fund, "gasPrice": w3.eth.gas_price}
+            send_transaction(w3, tx)
+            assert w3.eth.get_balance(sender, "latest") == fund
+        caller = deploy_contract(w3, CONTRACTS["TestRelayer"], key=acc.key).address
+        assert caller == RELAYER_CALLER, caller
         if is_hermes:
             hermes = Hermes(path.with_suffix(".toml"))
             call_hermes_cmd(
@@ -333,7 +346,7 @@ def get_balances(chain, addr):
 
 def ibc_multi_transfer(ibc):
     chains = [ibc.cronos.cosmos_cli(), ibc.chainmain.cosmos_cli()]
-    users = [f"user{i}" for i in range(1, 21)]
+    users = [f"user{i}" for i in range(1, 51)]
     addrs0 = [chains[0].address(user) for user in users]
     addrs1 = [chains[1].address(user) for user in users]
     denom0 = "basetcro"
@@ -413,10 +426,12 @@ def ibc_incentivized_transfer(ibc):
     receiver = chains[1].address("signer2")
     sender = chains[0].address("signer2")
     relayer = chains[0].address("signer1")
+    relayer_caller = eth_to_bech32(RELAYER_CALLER)
     amount = 1000
     fee_denom = "ibcfee"
     base_denom = "basetcro"
     old_amt_fee = chains[0].balance(relayer, fee_denom)
+    old_amt_fee_caller = chains[0].balance(relayer_caller, fee_denom)
     old_amt_sender_fee = chains[0].balance(sender, fee_denom)
     old_amt_sender_base = chains[0].balance(sender, base_denom)
     old_amt_receiver_base = chains[1].balance(receiver, "basecro")
@@ -456,7 +471,12 @@ def ibc_incentivized_transfer(ibc):
     def check_fee():
         amount = chains[0].balance(relayer, fee_denom)
         if amount > old_amt_fee:
-            assert amount == old_amt_fee + 20
+            amount_caller = chains[0].balance(relayer_caller, fee_denom)
+            if amount_caller > 0:
+                assert amount_caller == old_amt_fee_caller + 10, amount_caller
+                assert amount == old_amt_fee + 10, amount
+            else:
+                assert amount == old_amt_fee + 20, amount
             return True
         else:
             return False
@@ -471,17 +491,10 @@ def check_fee():
     ], actual
     path = f"transfer/{dst_channel}/{base_denom}"
     denom_hash = hashlib.sha256(path.encode()).hexdigest().upper()
-    assert json.loads(
-        chains[0].raw(
-            "query",
-            "ibc-transfer",
-            "denom-trace",
-            denom_hash,
-            node=ibc.chainmain.node_rpc(0),
-            output="json",
-        )
-    )["denom_trace"] == {"path": f"transfer/{dst_channel}", "base_denom": base_denom}
-    assert get_balances(ibc.chainmain, receiver) == [
+    denom_trace = chains[0].ibc_denom_trace(path, ibc.chainmain.node_rpc(0))
+    assert denom_trace == {"path": f"transfer/{dst_channel}", "base_denom": base_denom}
+    current = get_balances(ibc.chainmain, receiver)
+    assert current == [
         {"denom": "basecro", "amount": f"{old_amt_receiver_base}"},
         {"denom": f"ibc/{denom_hash}", "amount": f"{amount}"},
     ]
diff --git a/integration_tests/test_ibc_rly.py b/integration_tests/test_ibc_rly.py
index 73b624d196..abf1fdc00a 100644
--- a/integration_tests/test_ibc_rly.py
+++ b/integration_tests/test_ibc_rly.py
@@ -7,6 +7,7 @@
 
 from .ibc_utils import (
     RATIO,
+    RELAYER_CALLER,
     assert_duplicate,
     cronos_transfer_source_tokens,
     cronos_transfer_source_tokens_with_proxy,
@@ -59,6 +60,8 @@ def ibc(request, tmp_path_factory):
 
 
 def amount_dict(amt, denom):
+    if amt == 0:
+        return []
     return [
         AttributeDict(
             {
@@ -298,8 +301,8 @@ def test_ibc_incentivized_transfer(ibc):
         acknowledge_packet(seq0),
         distribute_fee(src_relayer, fee),
         *send_coins(feeibc_addr, src_relayer, src_amount, fee_denom),
-        distribute_fee(src_relayer, fee),
-        *send_coins(feeibc_addr, src_relayer, src_amount, fee_denom),
+        distribute_fee(RELAYER_CALLER, fee),
+        *send_coins(feeibc_addr, RELAYER_CALLER, src_amount, fee_denom),
         distribute_fee(cronos_signer2, fee),
         *send_coins(feeibc_addr, cronos_signer2, src_amount, fee_denom),
         fungible(checksum_dst_adr, cronos_signer2, amount, dst_denom),
diff --git a/integration_tests/test_ibc_rly_gas.py b/integration_tests/test_ibc_rly_gas.py
index fcad133e54..15ca0953a3 100644
--- a/integration_tests/test_ibc_rly_gas.py
+++ b/integration_tests/test_ibc_rly_gas.py
@@ -23,7 +23,7 @@ def test_ibc(ibc):
     cli = ibc.cronos.cosmos_cli()
     wait_for_new_blocks(cli, 1)
     rly_transfer(ibc)
-    diff = 0.01
+    diff = 0.15
     record = log_gas_records(cli)
     if record:
         records.append(record)
diff --git a/integration_tests/utils.py b/integration_tests/utils.py
index 8febe73595..e150fbcac5 100644
--- a/integration_tests/utils.py
+++ b/integration_tests/utils.py
@@ -62,6 +62,7 @@
     "TestBank": "TestBank.sol",
     "TestICA": "TestICA.sol",
     "Random": "Random.sol",
+    "TestRelayer": "TestRelayer.sol",
 }
 
 
@@ -421,6 +422,13 @@ def cronos_address_from_mnemonics(mnemonics, prefix=CRONOS_ADDRESS_PREFIX):
     return eth_to_bech32(acct.address, prefix)
 
 
+def derive_new_account(n=1):
+    # derive a new address
+    account_path = f"m/44'/60'/0'/0/{n}"
+    mnemonic = os.getenv("COMMUNITY_MNEMONIC")
+    return Account.from_mnemonic(mnemonic, account_path=account_path)
+
+
 def send_to_cosmos(gravity_contract, token_contract, w3, recipient, amount, key=None):
     """
     do approve and sendToCronos on ethereum side